JP4479014B2 - A current collector strip made of fired copper-impregnated carbon that exhibits excellent wear resistance at high speeds - Google Patents
A current collector strip made of fired copper-impregnated carbon that exhibits excellent wear resistance at high speeds Download PDFInfo
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- JP4479014B2 JP4479014B2 JP11190699A JP11190699A JP4479014B2 JP 4479014 B2 JP4479014 B2 JP 4479014B2 JP 11190699 A JP11190699 A JP 11190699A JP 11190699 A JP11190699 A JP 11190699A JP 4479014 B2 JP4479014 B2 JP 4479014B2
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- Prior art keywords
- copper
- wear resistance
- fired body
- impregnated carbon
- current collector
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
- C04B41/5127—Cu, e.g. Cu-CuO eutectic
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Description
【０００１】
【発明の属する技術分野】
この発明は、ＪＲ在来線や私鉄などの電気車（以下、普通電気車と云う）の集電すり板材として用いた場合に、特に高速走行ですぐれた耐摩耗性を発揮する銅含浸炭素焼成体製集電すり板材に関するものである。
【０００２】
【従来の技術】
従来、普通電気車の集電すり板材として、例えば１８〜２７％の気孔率を有し、かつ焼成コークスからなる炭素焼成体に、純銅を含浸してなる銅含浸炭素焼成体が広く実用に供されている。
また、この集電すり板材は、原料としてのピッチコークス粉末に、気孔率の調整とバインダー作用の付与を目的として所定割合のタールピッチを加え、２００〜３００℃に加熱した状態で混練し、室温に冷却してから粉砕混合した後、１〜１．５ｔｏｎ／ｃｍ2 の圧力で圧粉体にプレス成形し、この圧粉体を１２００〜１５００℃で焼成することにより焼成コークス、すなわち原料の前記ピッチコークス粉末とタールピッチの焼成により形成された焼成コークスからなり、かつ１８〜２７％の気孔率をもった炭素焼成体を形成し、ついでこの炭素焼成体に、減圧雰囲気にて純銅溶湯に浸漬した後、雰囲気を１００〜１５０気圧の加圧雰囲気とする銅含浸処理を施すことにより製造されることも良く知られるところである。
【０００３】
【発明が解決しようとする課題】
一方、近年、普通電気車もＪＲ新幹線と同様に高速走行化の傾向にあるが、通常の走行速度である約１００ｋｍ／ｈｒが１５０ｋｍ／ｈｒ以上に高速化すると、上記の従来集電すり板材では摩耗進行がきわめて速くなり、実用に供し得ないのが現状である。
【０００４】
【課題を解決するための手段】
そこで、本発明者等は、上述のような観点から、上記の従来集電すり板材に着目し、これの高速走行での耐摩耗性向上をはかるべく研究を行なった結果、集電すり板材を、焼成コークスの素地に７．３〜１４．６重量％の人造黒鉛が分散分布した組織、並びに１８．４〜２６．７％の気孔率を有する炭素焼成体に、無酸素銅を含浸してなる銅含浸炭素焼成体で構成すると、この結果の集電すり板材は、炭素焼成体の素地を構成する焼成コークス中に分散分布した人造黒鉛によって高速走行下での摩耗が著しく抑制され、すぐれた耐摩耗性を長期に亘って発揮するようになるという研究結果を得たのである。
【０００５】
この発明は、上記の研究結果にもとづいてなされたものであって、
ピッチコークス粉末と、人造黒鉛粉末と、タールピッチの混練圧粉体を焼成したものからなり、かつ、
（ａ）焼成コークスの素地に７．３〜１４．６重量％の人造黒鉛が分散分布した組織、
（ｂ）並びに１８．４〜２６．７％の気孔率、
を有する炭素焼成体に、無酸素銅を含浸してなる銅含浸炭素焼成体で構成してなる、高速走行ですぐれた耐摩耗性を発揮する銅含浸炭素焼成体製集電すり板材に特徴を有するものである。
【０００６】
なお、この発明の集電すり板材を構成する炭素焼成体において、人造黒鉛の含有割合を７．３〜１４．６重量％としたのは、その含有割合が７．３重量％未満では、所望のすぐれた耐摩耗性を確保することができず、一方その含有割合が１４．６重量％を越えると強度が急激に低下するようになるという理由からであり、また、その気孔率を１８．４〜２６．７％と定めたのは、その気孔率が１８．４％未満では含浸される無酸素銅の割合が少なくなりすぎて所望の導電性、すなわち１μΩ・ｍ以下の抵抗率を確保することができず、一方その気孔率が２６．７％を越えると、強度が急激に低下するようになるという理由によるものである。
【０００７】
【発明の実施の形態】
つぎに、この発明の集電すり板材を実施例により具体的に説明する。原料粉末として、１０〜２０μｍの範囲内の所定の平均粒径を有するピッチコークス粉末、並びに１０〜３０μｍの範囲内の所定の平均直径を有する人造黒鉛粉末を用い、これら両原料粉末を所定の割合に配合し、これに炭素焼成体の気孔率を調整すると共に、結合作用を発揮させる目的で所定割合のタールピッチを加え、２００〜３００℃の範囲内の所定温度に加熱した状態で２時間混練し、室温に冷却してから粉砕混合を加えた後、０．１〜１ton ／cm2 の範囲内の所定の圧力で圧粉体にプレス成形し、１２００℃に１時間保持の条件で焼成して表１に示される人造黒鉛含有量および気孔率の炭素焼成体を形成し、寸法調整した状態で、これを減圧含浸炉に装入し、含浸炉内を圧力：２torrに減圧し、いずれも１２００℃の温度に加熱した無酸素銅（純銅）の溶湯に浸漬し、１３０気圧の圧力を付加する条件で銅含浸処理を行なうことにより、いずれも厚さ：１２mm×幅：５５mm×長さ：１３５mmの寸法をもった本発明集電すり板材１〜９を製造した。また、比較の目的で、人造黒鉛の含有がなく、気孔率を表１に示される通りとした炭素焼成体を用いる以外は同一の条件で従来集電すり板材１〜３を製造した。
【０００８】
この結果得られた各種の集電すり板材から１０mm×１０mm×６０mmの寸法をもった試験片を切出し、強度を評価する目的でシャルピ衝撃値をそれぞれ５本の試験片について測定し、また導電性を評価する目的で抵抗率を１０本の試験片について測定した。これらの測定結果を表１に平均値で示した。
【０００９】
さらに、上記の集電すり板材から、厚さ：１０mm×幅：２５mm×長さ：６０mmの寸法をもった試験片を切出し、この試験片を用い、普通電気車にとって高速走行条件である以下に示す条件で通電摩耗試験を行なった。
通電摩耗試験は、モータの水平回転軸に中心を固定することにより直立支持された外径：２．２ｍの円板の前記固定側とは反対側面に、模擬トロリ線として外径：２ｍ×幅：５mm×厚さ：１５mmの硬銅リング（ＪＩＳ・Ｃ１１００・ＢＢ−Ｈ）を５０mm偏心して取付けた装置を用い、上記硬銅リングの直径線上の一方側に、まず、同じく厚さ：１０mm×幅：２５mm×長さ：６０mmの寸法を有し、硬質のＦｅ−Ｃｒ合金：６％およびＦｅ−Ｍｏ合金：１５％を分散含有し、かつ１５％の気孔率をもったＦｅ基合金焼結体に純Ｐｂを含浸してなるＰｂ含浸Ｆｅ基合金焼結体を、 押付力：５kgf 、
通電電流：１００Ａ、
円板の回転速度：２５km／ｈ、
時間：１０分、
の条件で面接触させて、上記硬銅リングの表面を実用状態のトロリ線と同等の表面状態とした上で、上記硬銅リングの直径線上の他方側に、上記試験片を、
押付力：５kgf 、
通電電流：２００Ａ、
円板の回転速度：１６０km／ｈ、
時間：１０分、
の条件で面接触させ、さらに上記条件でのＰｂ含浸Ｆｅ基合金焼結体および試験片の交互面接触をそれぞれ２回づつ、計３回づつ繰り返すことにより行ない、この通電摩耗試験をそれぞれ５本の試験片について行ない、試験後比摩耗量を測定し、この測定結果を平均値として表１に示した。
【００１０】
【表１】
【発明の効果】
表１に示される結果から、本発明集電すり板材１〜９は、いずれも従来集電すり板材１〜３と同等の強度および導電性を示した上で、高速走行で、これより一段とすぐれた耐摩耗性示すことが明らかである。
上述のように、この発明の集電すり板材は、高速走行で、すぐれた耐摩耗性を示し、長期に亘ってすぐれた性能を発揮するものであり、普通電気車の高速化に十分満足に適合するものである。[0001]
BACKGROUND OF THE INVENTION
The present invention is a copper-impregnated carbon fired that exhibits excellent wear resistance especially at high speeds when used as a current collecting strip material for electric vehicles (hereinafter referred to as ordinary electric vehicles) such as JR conventional lines and private railways. The present invention relates to a body current collector sheet material.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a copper-impregnated carbon fired body obtained by impregnating pure copper into a carbon fired body having a porosity of 18 to 27% and made of fired coke has been widely used as a current collecting ground plate material for ordinary electric vehicles. Has been.
In addition, this current collecting ground plate material is added to a pitch coke powder as a raw material with a predetermined proportion of tar pitch for the purpose of adjusting porosity and imparting a binder action, and kneaded in a state heated to 200 to 300 ° C. After cooling to crushing and mixing, it is press-molded into a green compact at a pressure of 1 to 1.5 ton / cm 2 , and the green compact is fired at 1200 to 1500 ° C. A carbon fired body composed of pitch coke powder and fired coke formed by firing tar pitch is formed, and a carbon fired body having a porosity of 18 to 27% is formed. Then, the carbon fired body is immersed in molten pure copper in a reduced pressure atmosphere. Then, it is well known that it is manufactured by performing a copper impregnation treatment in which the atmosphere is a pressurized atmosphere of 100 to 150 atm.
[0003]
[Problems to be solved by the invention]
On the other hand, in recent years, ordinary electric cars have also been on the trend of high-speed travel, similar to the JR Shinkansen. However, when the normal travel speed of about 100 km / hr is increased to 150 km / hr or higher, the conventional current collecting strip material described above is used. At present, the progress of wear becomes extremely fast and cannot be put to practical use.
[0004]
[Means for Solving the Problems]
In view of the above, the inventors of the present invention focused on the above-described conventional current collecting ground plate material, and as a result of conducting research to improve the wear resistance at high speeds of the current collecting ground plate material, In addition, a structure in which 7.3 to 14.6 % by weight of artificial graphite is dispersed and distributed on a calcined coke base and a carbon fired body having a porosity of 18.4 to 26.7 % are impregnated with oxygen-free copper. The resulting current-carrying ground plate material is excellent in that the wear under high-speed running is remarkably suppressed by artificial graphite dispersed and distributed in the calcined coke constituting the base of the carbon fired body. The research result that the wear resistance has been demonstrated over a long period of time was obtained.
[0005]
This invention was made based on the above research results,
Pitch coke powder, artificial graphite powder, and tar pitch kneaded green compact, and
(A) a structure in which 7.3 to 14.6 % by weight of artificial graphite is dispersed and distributed on a calcined coke substrate;
(B) and a porosity of 18.4-26.7 %,
It is made of a copper-impregnated carbon fired body made of copper-impregnated carbon, which is composed of a copper-impregnated carbon fired body impregnated with oxygen-free copper in a carbon fired body having excellent characteristics of wear resistance at high speeds. It is what you have.
[0006]
In addition, in the carbon fired body constituting the current collecting ground plate material of the present invention, the artificial graphite content is set to 7.3 to 14.6 % by weight when the content is less than 7.3 % by weight. This is because the excellent wear resistance cannot be ensured , while when the content exceeds 14.6 % by weight, the strength suddenly decreases . If the porosity is less than 18.4 %, the proportion of oxygen-free copper impregnated becomes too small to ensure the desired conductivity, that is, a resistivity of 1 μΩ · m or less. On the other hand, when the porosity exceeds 26.7 %, the strength suddenly decreases.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, the current collecting strip material of the present invention will be specifically described with reference to examples. As the raw material powder, pitch coke powder having a predetermined average particle diameter in the range of 10 to 20 μm and artificial graphite powder having a predetermined average diameter in the range of 10 to 30 μm are used. In addition to adjusting the porosity of the carbon fired body and adding a predetermined proportion of tar pitch for the purpose of exerting the binding action, the mixture is kneaded for 2 hours while heated to a predetermined temperature in the range of 200 to 300 ° C. After cooling to room temperature and pulverization and mixing, the green compact is press-molded at a predetermined pressure within the range of 0.1 to 1 ton / cm 2 and fired at 1200 ° C. for 1 hour. A carbon fired body with the artificial graphite content and porosity shown in Table 1 was formed, and after adjusting the dimensions, this was charged into a vacuum impregnation furnace, and the pressure in the impregnation furnace was reduced to 2 torr. Acid free heated to 1200 ° C The present invention has a thickness: 12 mm × width: 55 mm × length: 135 mm by immersion in a molten copper (pure copper) and performing a copper impregnation treatment under the condition of applying a pressure of 130 atm. Current collecting slabs 1 to 9 were produced. In addition, for the purpose of comparison, current-collecting ground-sheet members 1 to 3 were manufactured under the same conditions except that a carbon fired body having no artificial graphite and having a porosity as shown in Table 1 was used.
[0008]
Test specimens with dimensions of 10 mm x 10 mm x 60 mm were cut out from the various current collectors obtained as a result, and Charpy impact values were measured for each of the five specimens for the purpose of evaluating the strength. In order to evaluate the above, the resistivity was measured for 10 test pieces. These measurement results are shown in Table 1 as average values.
[0009]
Further, a test piece having a thickness of 10 mm × width: 25 mm × length: 60 mm is cut out from the above-described current collecting strip material, and this test piece is used to perform the following high-speed running conditions for an ordinary electric vehicle. An electrical wear test was conducted under the conditions shown.
In the electric wear test, the outer diameter: 2 m × width as a simulated trolley wire on the side opposite to the fixed side of the outer diameter: 2.2 m disk supported upright by fixing the center to the horizontal rotating shaft of the motor : 5mm x Thickness: 15mm hard copper ring (JIS · C1100 · BB-H) using a device with an eccentricity of 50mm, on the one side on the diameter line of the hard copper ring, the same thickness: 10mm × Sintered Fe-based alloy having dimensions of width: 25 mm × length: 60 mm, hard Fe—Cr alloy: 6% and Fe—Mo alloy: 15%, and 15% porosity A Pb-impregnated Fe-based alloy sintered body obtained by impregnating the body with pure Pb, pressing force: 5 kgf,
Energizing current: 100A,
Disc rotation speed: 25km / h,
Time: 10 minutes
The surface of the hard copper ring is brought into a surface state equivalent to a trolley wire in a practical state, and the test piece is placed on the other side of the diameter line of the hard copper ring.
Pressing force: 5kgf
Energizing current: 200A
Disc rotation speed: 160km / h,
Time: 10 minutes
The surface contact is performed under the above conditions, and the alternate surface contact between the Pb-impregnated Fe-based alloy sintered body and the test piece under the above conditions is repeated twice, a total of three times, and this electric wear test is performed for each of five. The specific wear amount after the test was measured, and the measurement result is shown in Table 1 as an average value.
[0010]
[Table 1]
【The invention's effect】
From the results shown in Table 1, the current collecting ground plate materials 1 to 9 of the present invention all showed the same strength and conductivity as the conventional current collecting ground plate materials 1 to 3, and at a higher speed, better than this. It is clear that it exhibits high wear resistance.
As described above, the current collecting strip material of the present invention exhibits excellent wear resistance at high speeds and exhibits excellent performance over a long period of time, and is sufficiently satisfactory for increasing the speed of ordinary electric vehicles. It is suitable.
Claims (1)
（ａ）焼成コークスの素地に７．３〜１４．６重量％の人造黒鉛が分散分布した組織、
（ｂ）並びに１８．４〜２６．７％の気孔率、
を有する炭素焼成体に、無酸素銅を含浸してなる銅含浸炭素焼成体で構成したことを特徴とする高速走行ですぐれた耐摩耗性を発揮する銅含浸炭素焼成体製集電すり板材。Pitch coke powder, artificial graphite powder, and tar pitch kneaded green compact, and
(A) a structure in which 7.3 to 14.6 % by weight of artificial graphite is dispersed and distributed on a calcined coke substrate;
(B) and a porosity of 18.4-26.7 %,
A copper-impregnated carbon fired body current collector made of a copper-impregnated carbon fired body exhibiting excellent wear resistance at high speed running, characterized in that the carbon fired body is made of a copper-impregnated carbon fired body obtained by impregnating oxygen-free copper .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11190699A JP4479014B2 (en) | 1999-04-20 | 1999-04-20 | A current collector strip made of fired copper-impregnated carbon that exhibits excellent wear resistance at high speeds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11190699A JP4479014B2 (en) | 1999-04-20 | 1999-04-20 | A current collector strip made of fired copper-impregnated carbon that exhibits excellent wear resistance at high speeds |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000302578A JP2000302578A (en) | 2000-10-31 |
| JP4479014B2 true JP4479014B2 (en) | 2010-06-09 |
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| JP11190699A Expired - Fee Related JP4479014B2 (en) | 1999-04-20 | 1999-04-20 | A current collector strip made of fired copper-impregnated carbon that exhibits excellent wear resistance at high speeds |
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| CN103482979B (en) * | 2013-09-24 | 2015-04-01 | 常州神驰轨道装备有限公司 | Preparing method for collector shoe |
| CN105819858A (en) * | 2016-05-19 | 2016-08-03 | 大同新成新材料股份有限公司 | Preparation method of pantograph carbon slider |
| CN113185292A (en) * | 2021-04-27 | 2021-07-30 | 宜宾学院 | Production method of extrusion-molded copper graphite material |
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